Which of the following characteristics is tru | vedclass

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(B) In humans,the $ABO$ blood grouping is controlled by the gene $I$. This gene has three alleles: $I^A$,$I^B$,and $i$. $I^A$ and $I^B$ produce differ

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Three alleles $I^A$,$I^B$,and $i$ are involved.

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(B) In humans,the $ABO$ blood grouping is controlled by the gene $I$. This gene has three alleles: $I^A$,$I^B$,and $i$. $I^A$ and $I^B$ produce different forms of sugar polymers on the plasma membrane of red blood cells,while $i$ does not produce any sugar. $I^A$ and $I^B$ are dominant over $i$,but $I^A$ and $I^B$ show codominance when present together. Therefore,the correct characteristic is that three alleles $I^A$,$I^B$,and $i$ are involved in the control of blood groups.

Which of the following characteristics is true for the control of blood groups in humans?

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